How to fix the ESOF(Electric Shift On the Fly) 4x4 on a Ford
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- Опубліковано 21 лис 2013
- How to fix the ESOF(Electric Shift On the Fly) on a Ford. If your dash says you have 4x4 but you do not actually have 4x4 this video might help. In this video I troubleshoot and eventually replace the PVH (Pulse Vacuum Hublock) solenoid.
of the thousands out there... this video is by far the most informative. Not all fluff, actual troubleshooting ideas. Very good. thank you.
So I very rarely look to UA-cam for advice and have NEVER posted anything, but after this video, all bets are off. So I'm fairly mechanically inclined, but lazy and hate paying mechanics. So long story short, my ESOF has not worked for years. Again, being lazy and cheap, I just got out of the truck and manually locked the hubs when needed. Then I decided to look on UA-cam and found this video. OMG. Followed it exactly and when I shifted to 4X4, the air to the front vent shut-off. I immediately went to look at the hoses leading to the hubs and within about 2 seconds, I found a big hole in the vacuum line that obviously was rubbing on metal. THANK YOU for not only saving me TIME but I'm sure probably $300-$500 at the shop. Perfectly produced video!!!!
Thank you so much. I was a FORD Master tech from 1979-1998. I own a 2009 F150 4x4. I didn't know the trucks use a vacuum system to operate the hubs. My 4x4 has not worked for 10 months. After watching your video I was able to pinpoint the problem to the vacuum senoid on the vacuum tank. I replaced it. It's working. Thank You.
A quick note of thanks. Your video helped me quickly find a similar problem. Turned out to be a vacuum line that cracked at the connector right after the valve.
Your video encouraged me to get the same vacuum gauge for like $50. It kept me from paying $130 for the diagnosis. All my lines are good, both hub seals are bad. 👍
Hey Bob, great video! I was able to restore ESOF function on my 2000 F350 Lariat Dually CCLB just by following along with your video , total cost was around a $120.00 CAD ($95.00 USD) including a vacuum pump, 5' vacuum line and a PVH solenoid.
One of the most straight forward and clear videos on this issue. Thank you!!!! I am diagnosing my 07 f250 as we speak. This is helping me big time. I’m hoping mine is the same issue.
thanks for the info. The part number is 7C3Z-9H465-A for people like me trying to freeze the video at the exact right moment! It's the same for my 2003 F-350. My problem is that the PVH gives vacuum to the hubs, but only for a couple of seconds. Research tells me it should give a vacuum for 45 seconds when you engage 4wd, and 15 seconds when you disengage. Just ordered a new PVH, hope it does the job. Thanks for making the video, it really helped!
This video is EXACTLY what I was looking for and should be an example for other 'how to troubleshoot' videos. Very well done.
Just an added bit of information for those who may not know. The heater/ac air distribution system on most vehicles has a blend door actuator that is vacuum operated. That's the troubleshooting connection between the vacuum operated front hub engagement system and the vehicle HVAC system. It's a clever and easy test to check for vacuum leaks. Well done.
Gotta say, if every mechanical problem was accompanied by a how-to-fix-it of this quality, mechanics would be out of business! Excellent excellent job, many thanks.
Your video was a huge help. I was able to pin point the problem on my f-250 super duty in less than 20 min. $65.00 on ebay for an OEM PVH. One happy Hillbilly here. I just bought it a week ago.
I had already isolated it the same way you did before I found your video but you confirmed my suspicions...thank you!
Fixed my 2001 7.3 today after watching this video. Turned out the relay fuse was bad. One was bad Thanks
Thank you for this video! You saved me lots of time and money from taking my truck to the shop.
Thanks for the time you spent on this demo.
Superb detail. Very clear explanations. I learned a lot. Thank you!
fantastic video - just wish i watched before i took it to the garage to address my issue.
Were never to old to learn, someone on you tube has been there and done that, so thanks guy's for helping us old guy's out.I have something wrong with my 2004, 250 Ford want get out of 4x4. has 172k,but with your help i'll fix it... Thanks
Very Very NICE! One of the best 4wd diagnostic videos on UA-cam i've ever seen. Mine works but if it fails I'll know what to look for if it's a vacuum problem. Thanks Bob. Best Wishes n Blessings